A uniform magnetic field of magnitude 0.20Tis directed along the positive x axis. A positron moving at 1.00x10' m's enters the field along a direction that makes an angle of 80.0° with the x axis. The motion of the particle is expected to be a helix What is the pitch of the trajectory in mm? (m,-9.11x10 kg. g-1.6x10"C)

Physics 6. A loop of area 0.250 m2 is in a uniform 0.020 0-T magnetic field. If the flux through the loop is 3.8310-3 T·m2, what angle does the normal to the plane of the loop make with the direction of the magnetic field?

An electron in a magnetic field moves along a circle with a radius of 25.4 m with a speed that follows: v(t)=V0e−bt where b = 0.56 s-1and V0 = 170 m/s. I need to find the angular acceleration at t=3.7s, but I don't know how I'm supposed to get that becuase the formula that we have says that it is the second derivative of angular position, but when I calculate angular position all I get is 6.57516 radians. I don't understand how I'm supposed to take a derivative of that since it doesn't have any variables.  I don't know if it is needed for this, but I already calculated the centripetal acceleration as 18.0446m/s^2

HW #6